Ref. principal | Lévêque, C., 2003 |
Aparência refere-se a | |
Bones in OsteoBase |
órgãos especializados | no special organs |
aparência diferente | different morphology in juveniles and adults |
cores diferentes | different colors in juveniles and adults |
Notas |
Características determinantes | striking type of mouth |
Forma lateral do corpo | fusiform / normal |
Secção transversal | |
Perfil dorsal da cabeça | more or less straight |
Tipo de olhos | more or less normal |
Tipo de boca/focinho | more or less normal |
Posição da boca | sub-terminal/inferior |
Type of scales | cycloid scales |
Diagnose |
Diagnosis: distal margin of dorsal fin concave; body depth 1.9-3.0x SL; depth of caudal peduncle 0.8-1.2x its length; 24-42 (50-150mm) and 41-44 (150-250mm) gill rakers; scale formula 4.5-5.5/33-38/6.5; 3-4 scales between lateral line and pelvic-fin base; 12-16 scales around caudal peduncle; 9-10 dorsal fin branched rays (Ref. 2940, 81282). Description: body rather elongate; snout prominent and tuberculate; two pairs of rather short barbels; all specimens examined had 12 scales around caudal peduncle, except for populations from Ogun (14 and sometimes even 16 scales); dorsal fin with concave distal margin in adults and showing allometric growth, the longest ray growing proportionally faster than head length; D:III,(9)10; A:III,5; P:16-17; V:I,8 (Ref. 2940, 81282). Coloration: back blackish or greyish-green, belly whitish; dark longitudinal band along middle of sides from gill cover to end of caudal peduncle, bordered in live specimens by light yellowish bands; fins tinged with yellowish-pink; the above colour pattern is characteristic for juveniles or medium-sized individuals; pale bands bordering dark mid-lateral band tend to disappear after death, as well as in large individuals which are more uniformly colored on sides (Ref. 2940, 81282). |
Facilidade de identificação |
Linhas laterais | 1 interrompido: No |
Escamas na linha lateral | 33 - 38 |
Escamas da linha lateral com poros | |
Escamas em séries laterais | |
Fileiras de escamas acima da linha lateral | 4 - 6 |
Fileiras de escamas abaixo da linha lateral | 3 - 7 |
Escamas em torno do pedúnculo caudal | 12 - 16 |
Barbilhões | 0 |
Fissuras branquiais (tubarões/raias apenas) | |
Raios branquiais | |
no membro inferior | |
no membro superior | |
total | 24 - 44 |
Vértebras | |
Pré-anal | |
total | 29 - 31 |
Atributos | no striking attributes |
Número de barbatanas | 1 |
No. de pínulas | Dorsal |
Ventral | |
Total de espinhos | |
Total de raios moles | 12 - 13 |
Barbatana adiposa | absent |
Atributos | forked; more or less normal |
Número de barbatanas | 1 |
Total de espinhos | |
Total de raios moles | 8 - 8 |
Peitoral | Atributos more or less normal |
espinhos 0 | |
Raios moles 16 - 17 | |
Pélvica | Atributos more or less normal |
posição abdominal behind origin of D1 | |
espinhos | |
Raios moles 9 - 9 |